Supianto, A. A., S. A. Wicaksono, F. A. Bachtiar, A. D. Herlambang, Y. Hayashi, and T. Hirashima. “Web-Based Application for Visual Representation of Learners’ Problem-Posing Learning Pattern”. Journal of Information Technology and Computer Science, vol. 4, no. 1, June 2019, pp. 103-15, doi:10.25126/jitecs.20194172.